KR102453905B1 - Distance recommendation device for golf considering wind chracteristic - Google Patents

Abstract

According to an embodiment of the present invention, a golf distance recommendation apparatus is a method for providing a recommended distance in consideration of wind characteristics, based on measurement information including a straight-line distance from a current location to a target and an inclination to the target. , calculating a horizontal distance, a vertical distance, and a recommended shot distance to the target without considering the influence of wind; calculating a horizontal distance correction value for the horizontal distance based on wind direction and wind speed information; calculating an adjusted landing angle for a preset landing angle based on the wind direction and wind speed information; and calculating an additional distance correction value based on the adjusted landing angle and the vertical distance, and calculating a final recommended distance by adding the calculated additional distance correction value and the horizontal distance correction value. A method is provided.

Description

Distance recommendation device for golf considering wind characteristics

The present invention relates to a golf distance recommendation device in consideration of wind characteristics, and to a golf distance recommendation device for generating recommended distance information to a target in consideration of wind characteristics measured by the device itself.

Recently, as golf facilities such as screen golf courses and indoor golf driving ranges increase, golf is gradually developing as one of the popular sports in Korea. In particular, as the golf population increases, the number of golfers who go out and play on the field is also increasing.

A golfer who plays a round on the field must consider several factors to hit a good shot, the most important of which are distance information including the distance from the position of the golf ball to the pin, and the strength and direction of the wind currently blowing on the field. weather information, including In other words, you need to know the exact distance to the bunker, water hazard, or green placed on each course to choose the right club. You can hit precise shots.

The golf distance measurement method according to the prior art is largely divided into two types, one is a distance measurement method using a laser, and the other is a distance measurement method using a GPS. The distance measurement method using a laser is a method of emitting a laser toward a target, measuring the time when a part of the emitted laser is reflected off the target, and then multiplying the measured time and the speed of the laser to measure the distance to the target to be. This laser distance measuring method has the advantage of being able to measure the distance to the target very accurately by accurately detecting the time when the laser is reflected back, whereas when used at a long distance such as 200 yards or more, the laser equipment Because it is difficult to accurately aim the laser at the target due to the slight shaking of the hand holding the , it is difficult to use it on the tee ground.

On the other hand, the distance measurement method using a GPS (Global Positioning System) receives navigation data and a Pseudo-Random-Noise code (PRN code) by a GPS receiver, and calculates the distance from the GPS receiver to each satellite. This is done in a way that calculates In this case, the three-dimensional coordinates can be determined by triangulation through the distance information calculated through the GPS receiver, and the latitude, longitude, and altitude of the GPS receiver can be obtained therefrom. Such a distance measurement method using GPS has the advantage of being able to know the corresponding coordinates from any location on the earth. In situations in which sophisticated approach shots are required, such as , chip shots, etc., there is a problem of low utilization.

On the other hand, in the field, weather characteristics, particularly, characteristics related to wind (wind speed and wind direction) greatly affect the shot.

Currently, all the technologies are for informing the user of the wind characteristics measured by the golf range finder as described above or the wind characteristics received from an external server in a form that the user can check.

Although golfers can check the distance to the target through laser or GPS, it is very difficult to determine the exact strength of a shot unless you are highly skilled because you have to consider the effect of the wind yourself.

It is an object of the present invention to solve the problems of the prior art described above.

An object of the present invention is to provide a recommended distance for golf by reflecting the characteristics of the wind, thereby enabling easy setting of a shot distance from a golfer's point of view.

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood from the description below.

According to one embodiment of the present invention for achieving the above object, the distance recommendation apparatus for golf is a method for providing a recommended distance in consideration of wind characteristics, the straight-line distance from the current location to the target, and the inclination to the target Calculating a horizontal distance, a vertical distance, and a recommended shot distance to the target without considering the influence of wind, based on the measurement information including; calculating a horizontal distance correction value for the horizontal distance based on wind direction and wind speed information; calculating an adjusted landing angle for a preset landing angle based on the wind direction and wind speed information; and calculating an additional distance correction value based on the adjusted landing angle and the vertical distance, and calculating a final recommended distance by adding the calculated additional distance correction value and the horizontal distance correction value. A method is provided.

Calculating the horizontal distance correction value may include: calculating a first rate that is differently applied according to a wind direction based on a target direction; calculating a second rate proportional to the wind speed, inversely proportional to the horizontal distance, and proportional to the first rate; and adding or subtracting a product of the horizontal distance and the second rate to the horizontal distance to obtain the horizontal distance correction value.

The second rate may be a value to which a coefficient is applied so that the second rate is calculated to be higher in the case of the front wind than in the case of the rear wind.

Calculating the adjusted landing angle may include: calculating a landing angle correction value that is proportional to wind speed, inversely proportional to the preset landing angle, and proportional to the first yaw rate; and adding or subtracting the landing angle correction value to the preset landing angle to obtain the adjusted landing angle.

The landing angle correction value may be a value to which a coefficient is applied to be calculated to be higher in the case of the front wind than in the case of the rear wind.

According to another embodiment of the present invention, a wind characteristic measuring unit for measuring a wind direction and a wind speed; a distance measuring unit that calculates a horizontal distance, a vertical distance, and a recommended shot distance to the target without considering the influence of wind, based on measurement information including a straight line distance from the current location to the target, and an inclination to the target; and calculating a horizontal distance correction value for the horizontal distance based on the wind direction and wind speed information, calculating an adjusted landing angle for a preset landing angle based on the wind direction and wind speed information, and then calculating the adjusted landing angle and the vertical distance Calculates an additional distance correction value based on , and adds the calculated additional distance correction value and the horizontal distance correction value to provide a golf distance recommendation apparatus including a wind influence reflecting unit for calculating a final recommended distance.

According to an embodiment of the present invention, since the recommended distance for golf is provided by reflecting the characteristics of the wind, it is possible for the golfer to easily set the shot distance.

1 is a view showing the configuration of a golf distance recommendation apparatus according to an embodiment of the present invention.
2 is a configuration diagram for explaining an operation of a wind characteristic measuring unit according to an embodiment of the present invention.
3 is a block diagram illustrating an internal configuration of a distance recommendation apparatus according to an embodiment of the present invention.
4 is a diagram for explaining a method of calculating a recommended distance without considering wind characteristics according to an embodiment of the present invention.
5 is a view for explaining a wind speed according to an embodiment of the present invention.
6 is a diagram for explaining information provided according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0016] Reference is made to the accompanying drawings, which show by way of illustration specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents to those claimed. Like reference numerals in the drawings refer to the same or similar functions throughout the various aspects.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to enable those of ordinary skill in the art to easily practice the present invention.

1 is a view showing the configuration of a golf distance recommendation apparatus according to an embodiment of the present invention.

Referring to FIG. 1 , the wind characteristic measuring unit 110 may be mounted on at least a part of the distance recommendation apparatus 100 .

In FIG. 1 , as an example of the distance recommendation device 100 , when the laser emitted from the first objective lens L1 that receives light from the outside or the subject and the laser emitted from the distance recommendation device 100 is reflected on the target, the reflected laser is shown in FIG. 1 . Although the laser range finder including the second objective lens (L2) for receiving light and the eyepiece (L3) for allowing the golfer to check the subject with the naked eye is shown, according to the embodiment of the present invention, a GPS type distance finder or its Other devices may be substituted.

That is, it should be understood that, regardless of the type of device, if the wind characteristic measuring unit 110 described below is mounted, it should be understood as belonging to the scope of the present invention.

In the distance recommendation apparatus 100 illustrated in FIG. 1 , the wind characteristic measuring unit 110 may be mounted between the first objective lens L1 and the second objective lens L2 .

Meanwhile, the distance recommendation apparatus 100 may include a button 120 for activating the wind characteristic measurement unit 110 .

2 is a configuration diagram for explaining an operation of a wind characteristic measuring unit according to an embodiment of the present invention.

Referring to FIG. 2 , the wind characteristic measuring unit 110 mounted on the distance recommendation apparatus 100 may include a plurality of voice receiving units M1 , M2 , and M3 , for example, a microphone.

Although it is illustrated in FIG. 2 that three voice receivers M1, M2, and M3 are provided, it is sufficient if a plurality of voice receivers are included.

The distance between the center of each of the plurality of voice receivers M1, M2, and M3 and the center of the wind characteristic measuring unit 110 is all arranged to be the same. In addition, it is preferable that the center-to-center distances of the neighboring voice receivers M1, M2, and M3 are all equally arranged.

Each of the voice receivers M1, M2, and M3 may receive airflow noise generated due to the discontinuous surface of the air. To this end, each of the voice receivers M1, M2, and M3 may further include a component that forms a discontinuous surface of air, for example, a suction guide. When the wind blows, air is scattered by the discontinuous surface and partial pressure change occurs, and this change in air pressure forms a sound pressure to generate airflow noise. It can be manufactured in a shape to generate a flow. The noise received by the voice receivers M1, M2, and M3 may be converted into a digital signal by an A/D converter and filtered by a filter that passes only a frequency band corresponding to wind noise.

The wind speed is calculated by a software method, and the wind speed value may be calculated based on the level of the signal received by the plurality of voice receivers M1, M2, and M3, converted and filtered.

In addition, the wind direction can also be calculated by a software method. The noise signal collected by the plurality of voice receivers M1 , M2 , M3 uniformly arranged at each azimuth with respect to the center of the wind characteristic measuring unit 110 . The current wind direction can be determined according to the ratio between the levels.

For example, when a voice signal is received from each of the voice receivers M1, M2, and M3 in the form shown in FIG. 2 , the wind noise is the largest in the second voice receiver M2, and the second voice It can be confirmed that the wind blows in the direction in which the wind noise is the smallest in the receiver M3.

According to an embodiment of the present invention, wind characteristics measured by the above method, ie, wind direction and wind speed data, may be reflected in generating distance recommendation information for golf.

Hereinafter, a method of providing golf distance recommendation information according to an exemplary embodiment will be described with reference to FIG. 3 .

3 is a block diagram illustrating an internal configuration of a distance recommendation apparatus according to an embodiment of the present invention.

Referring to FIG. 3 , the distance recommendation apparatus 100 according to an embodiment includes a wind characteristic measuring unit 110 , a button 120 , a user input information receiving unit 130 , a distance measuring unit 140 , and a wind influence reflecting unit. 150 and the display unit 160 may be included.

Some operation modules of the wind characteristic measuring unit 110 , the user input information receiving unit 130 , the distance measuring unit 140 , and the wind influence reflecting unit 150 may be program modules or hardware capable of communicating with an external device. Such a program module or hardware may be included in the distance recommendation device 100 or other device capable of communicating therewith in the form of an operating system, application program module, and other program modules, and may be physically stored in various known storage devices. have. Meanwhile, these program modules or hardware include, but are not limited to, routines, subroutines, programs, objects, components, data structures, etc. that perform specific tasks to be described later or execute specific abstract data types according to the present invention.

The wind characteristic measuring unit 110 performs a function of measuring the current wind characteristics, that is, the wind direction and the wind speed according to the method described with reference to FIG. 2 . To this end, the wind characteristic measuring unit 110 may be configured to include a plurality of voice receivers, an A/D converter, a filter unit, and the like.

As described with reference to FIG. 1 , the button 120 performs a function of turning on/off the wind characteristic measurement unit 110 when operated by a golfer.

The user input information receiving unit 130 performs a function of receiving reference information input from the distance recommendation device 100 or a separate device capable of communicating therewith, for example, a separate smart device. Here, the reference information is information for determining the angle between the vertical line and the direction in which the golf ball falls on the ground after the golfer makes a shot, that is, the landing angle, and the landing angle is for sending the golf ball to the target. It is used to calculate a recommended distance for a shot.

The reference information may be, for example, a distance at which a golf ball can be sent when a shot is made using the 7-iron 7i for each golfer. Such reference information may be input by the user or may be preset (eg, 140m or 150m).

The distance measuring unit 140 refers to the linear distance to the target, the inclination angle, the reference information, and the like, and calculates the recommended distance to shoot the golf ball to the target without considering the characteristics of the wind. carry out

Hereinafter, with reference to FIG. 4 , a method for calculating the recommended distance by the distance measuring unit 140 without considering the characteristics of the wind will be described.

Referring to FIG. 4 , first, the distance measuring unit 140 measures the linear distance A from the current position of the distance recommendation apparatus 100 , that is, the position of the golfer to the target T. For example, the distance to the target can be measured by measuring the time for a part of the emitted laser to be reflected back to the target after the laser is emitted toward the target and multiplied by the measured time and the speed of the laser.

Here, it is assumed that the straight-line distance A measured in this way is 170 m.

Meanwhile, the distance measuring unit 140 may measure the inclination angle B between the current position and the position of the target. A gyro sensor may be included to measure the inclination angle B. It is assumed that the measured inclination angle B is -7°, that is, the target T exists at a position of 7° as a downhill slope based on the position of the distance recommendation apparatus 100 .

The distance measuring unit 140 calculates the horizontal distance (X) and the vertical distance (Y) from the current position to the target (T) with reference to the linear distance (A) and the inclination angle (B) in Equations 1 and 2 can be calculated as

[Equation 1]

[Equation 2]

If the vertical distance Y is negative (-), it means that the target T is downward from the golfer's current position.

Meanwhile, the distance measuring unit 140 calculates the additional distance Z for sending the golf ball to the target T as in Equation 3 below.

[Equation 3]

In Equation 3, C is the landing angle described above, which may be changed according to reference information input by a user or preset, that is, the shot distance of the 7-iron, and may be extracted through information stored in a table form. For example, as shown in Table 1 below, the landing angle for each reference distance of the 7-iron may be pre-stored.

Reference information (7 iron distance)
(Unit: m) landing angle
(unit) 210 53 200 41 190 47 180 44 170 47 160 45 150 44 140 43 130 43 120 43 110 42 100 41

Assuming that the user inputs 150m as reference information, the landing angle, that is, the C value in Equation 3 above, becomes 44°. Accordingly, the additional distance Z becomes -20m (=(-20m)·tan(44°)). When wind is not taken into account, in the current state, the distance recommended to the user is calculated as the sum of the horizontal distance X and the additional distance Z to the target T, and in the above example, 148.7 m (= 168.7 m) -20 m) can be calculated.

Referring again to FIG. 3 , the wind influence reflecting unit 150 according to an embodiment reflects the influence of the wind on the recommended distance calculated by the distance measuring unit 140 to calculate the final recommended distance. do.

First, the wind influence reflecting unit 150 calculates a wind direction based on a straight line connecting the current location and the target T. Since the absolute direction of the wind is measured by the wind characteristic measuring unit 110 , the wind influence reflecting unit 150 may calculate the wind direction WD based on the straight line through this. The direction of the target T from the current position can be confirmed through the direction of the target T set when measuring the distance.

For example, as shown in FIG. 5 , if the wind direction WD is 0 to 90 degrees or 271 to 359 degrees with respect to the target direction TD, it is a tail wind, that is, a wind blowing from the back to the front, and the wind direction WD. If it is between 91 and 270 degrees, it will be a forward wind, that is, a wind that blows from front to back. Here, it is assumed that the wind direction WD is 270°.

In addition, the wind influence reflecting unit 150 calculates the first rate WER applied according to the wind direction. When the wind direction WD with respect to the target T direction is 180° or less, the first rate WER is calculated according to Equation 4 below.

[Equation 4]

Also, when the wind direction WD exceeds 180° and is less than or equal to 359°, the first rate WER is calculated according to Equation 5 below.

[Equation 5]

The first rate (WER) is a variable for reflecting the degree of influence of wind speed on the golf ball according to the wind direction (WD), has a value of 0 or more and 1 or less, and the wind direction (WD) is 0˚ or 180˚ , the first rate WER becomes 1 according to Equation 4 above. That is, when the wind direction WD coincides with the direction of the target T or is completely reversed, the wind speed is reflected in the final recommended distance calculation as it is.

In the above assumption, since the wind direction WD is 270°, according to Equation 5, the rate WER becomes zero.

In addition, the wind effect reflecting unit 150 is the effect on the horizontal distance (X) to the target (T) according to the wind speed (WP) measured by the wind characteristic measuring unit (110), that is, while the golf ball stays in the air. Calculate the second rate (WDR) according to the impact received.

First, when the wind direction WD is 0 to 90 degrees or 271 to 359 degrees (backwind), the second rate WDR may be calculated by Equation 6 below.

[Equation 6]

In Equation 6, k1 is a tail wind coefficient, and may be set to, for example, 1.2.

Also, when the wind direction WD is 90° to 270° (forward wind), the second rate WDR may be calculated by Equation 7 below.

[Equation 7]

In Equation 7, k2 is a forward wind coefficient, and may be set to, for example, 2.5.

As can be seen from Equations 6 and 7, the second rate WDR is proportional to the wind speed WP, inversely proportional to the horizontal distance X, and calculated to be higher in the case of the front wind than the case of the rear wind. is set to be

As described above, if the wind direction WD is 270°, the first yaw rate WER is 0, and thus the second yaw rate WDR is also 0.

Meanwhile, the wind influence reflecting unit 150 calculates a landing angle correction value WAA according to the influence of the wind.

First, when the wind direction WD is 0 to 90 degrees or 271 to 359 degrees (back wind), the landing angle correction value WAA may be calculated by Equation 8 below.

[Equation 8]

In Equation 6, k3 is a tail wind coefficient, and may be set to, for example, 62.

Also, when the wind direction WD is 90° to 270° (forward wind), the landing angle correction value WAA may be calculated by Equation 9 below.

[Equation 9]

In Equation 9, k4 is a forward wind coefficient, and may be set to, for example, 100.

As can be seen from Equations 6 and 7, the landing angle correction value (WAA) is proportional to the wind speed (WP), inversely proportional to the original landing angle (C), and in the case of a forward wind rather than a rear wind. It is set to yield higher.

As described above, when the wind direction WD is 270°, the first yaw rate WER is 0, so the landing angle correction value WAA also becomes 0.

The wind influence reflecting unit 150 calculates an adjusted landing angle WLA based on the landing angle correction value WAA.

When the wind direction (WD) is 0 to 90˚ or 271 to 359˚ (back wind), the landing angle correction value (WAA) is added to the landing angle (C) to calculate the adjusted landing angle (WLA), , when the wind direction WD is 90° to 270° (forward wind), the landing angle correction value WAA is subtracted from the landing angle C to calculate the adjusted landing angle WLA.

In the above example, if the wind direction WD is 270°, the landing angle correction value WAA is 0, so the adjusted landing angle WLA is still 44°.

The wind influence reflecting unit 150 calculates a correction value Wx of the horizontal distance X based on the second yaw rate WDR described with reference to Equations 6 and 7 above.

First, when the wind direction WD is 0 to 90 degrees or 271 to 359 degrees (back wind), the horizontal distance correction value Wx is calculated by Equation 10 below.

[Equation 10]

In addition, when the wind direction WD is 90° to 270° (forward wind), the horizontal distance correction value Wx may be calculated by Equation 11 below.

[Equation 11]

Meanwhile, based on the adjusted landing angle WLA, an additional distance correction value WAD for sending the golf ball to the target T is calculated as shown in Equation 12 below.

[Equation 12]

In the above example, when the wind direction is 270°, the adjusted landing angle WLA is 44°, so the additional distance correction value WAD becomes -20 m.

The wind influence reflecting unit 150 finally adds the horizontal distance correction value Wx and the additional distance correction value WAD to calculate a final recommended distance reflecting the influence of the wind. In the above example, since the horizontal distance correction value Wx and the additional distance correction value WAD are 168.7 m and -20 m, respectively, the final recommended distance becomes 148.7 m.

As shown in FIG. 6 , the measured and calculated values may be displayed in a form that can be confirmed by the user through the display unit 160 of the distance recommendation apparatus 100 , for example, a viewfinder.

Referring to FIG. 6 , a final recommended distance in consideration of wind speed, wind direction, a straight line distance to a target, and wind characteristics may be displayed.

According to an embodiment of the present invention, since the recommended distance for golf is provided by reflecting the characteristics of the wind, it is possible for the golfer to easily set the shot distance.

The foregoing description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a distributed manner, and likewise components described as distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

Claims (6)

A golf distance recommendation device, as a method for providing a recommended distance in consideration of wind characteristics,
calculating a horizontal distance, a vertical distance, and a recommended shot distance to the target without considering the influence of wind, based on the measurement information including the straight line distance from the current location to the target and the inclination to the target;
calculating a horizontal distance correction value for the horizontal distance based on wind direction and wind speed information measured by a wind characteristic measuring unit included in the golf distance recommendation device;
calculating an adjusted landing angle with respect to a preset landing angle based on the wind direction and wind speed information measured by the wind characteristic measurement unit; and
calculating an additional distance correction value based on the adjusted landing angle and the vertical distance, summing the calculated additional distance correction value and the horizontal distance correction value, to calculate a final recommended distance;
The wind characteristic measuring unit includes a plurality of audio receivers for receiving airflow noise generated due to a discontinuous surface of the air, and calculates a wind speed value based on the level of the signal received by the plurality of audio receivers, and the plurality of sounds The wind direction is determined according to the ratio between the levels of the noise signal collected by the receiver,
All distances between the center of each of the plurality of voice receivers and the center of the wind characteristic measuring part are the same, the distances between each of the plurality of voice receivers are all the same, and the plurality of voice receivers are based on the center of the wind characteristic measuring part A method of providing a recommended distance, uniformly placed in each azimuth. According to claim 1,
Calculating the horizontal distance correction value comprises:
calculating a first rate that is differently applied according to a wind direction based on the target direction;
calculating a second rate proportional to the wind speed, inversely proportional to the horizontal distance, and proportional to the first rate; and
and adding or subtracting a product of the horizontal distance and the second rate to the horizontal distance to obtain the horizontal distance correction value. 3. The method of claim 2,
The method for providing a recommended distance, wherein the second rate is a value to which a coefficient is applied so that the second rate is calculated to be higher in the case of the front wind than in the case of the rear wind. 3. The method of claim 2,
Calculating the adjusted landing angle comprises:
calculating a landing angle correction value proportional to the wind speed, inversely proportional to the preset landing angle, and proportional to the first yaw rate; and
and obtaining the adjusted landing angle by adding or subtracting the landing angle correction value to the preset landing angle. 5. The method of claim 4,
The landing angle correction value is a value to which a coefficient is applied to be calculated to be higher in the case of the front wind than in the case of the rear wind, the recommended distance providing method. a wind characteristic measuring unit for measuring wind direction and wind speed;
a distance measuring unit that calculates a horizontal distance, a vertical distance, and a recommended shot distance to the target without considering the influence of wind, based on measurement information including a straight line distance from the current location to the target, and an inclination to the target; and
After calculating a horizontal distance correction value for the horizontal distance based on the wind direction and wind speed information, calculating an adjusted landing angle for a preset landing angle based on the wind direction and wind speed information, the adjusted landing angle and the vertical distance Comprising a wind influence reflecting unit that calculates an additional distance correction value based on the basis, sums the calculated additional distance correction value and the horizontal distance correction value, and calculates a final recommended distance,
The wind characteristic measuring unit includes a plurality of audio receivers for receiving airflow noise generated due to the discontinuous surface of the air, and calculates a wind speed value based on the level of the signal received by the plurality of audio receivers, and the plurality of sounds The wind direction is determined according to the ratio between the levels of the noise signal collected by the receiver,
All distances between the center of each of the plurality of voice receivers and the center of the wind characteristic measuring part are the same, the distances between each of the plurality of voice receivers are all the same, and the plurality of voice receivers are based on the center of the wind characteristic measuring part A distance recommendation device for golf, which is uniformly disposed at each azimuth.

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